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306 results on '"Taylor, E.w."'

3. Using aerobic exercise to evaluate sub-lethal tolerance of acute warming in fishes

Author

Blasco, F.R., Esbaugh, A.J., Killen, Shaun, Rantin, F.T., Taylor, E.W., and McKenzie, D.J.

Abstract

We investigated whether fatigue from sustained aerobic swimming provides a sub-lethal endpoint to define tolerance of acute warming in fishes, as an alternative to loss of equilibrium (LOE) during a critical thermal maximum (CTmax) protocol. Two species were studied, Nile tilapia (Oreochromis niloticus) and pacu (Piaractus mesopotamicus). Each fish underwent an incremental swim test to determine gait transition speed (UGT), where it first engaged the unsteady anaerobic swimming mode that preceded fatigue. After suitable recovery, each fish was exercised at 85% of their own UGT and warmed 1°C every 30 min, to identify the temperature at which they fatigued, denoted as CTswim. Fish were also submitted to a standard CTmax, warming at the same rate as CTswim, under static conditions until LOE. All individuals fatigued in CTswim, at a mean temperature approximately 2°C lower than their CTmax. Therefore, if exposed to acute warming in the wild, the ability to perform aerobic metabolic work would be constrained at temperatures significantly below those that directly threatened survival. The collapse in performance at CTswim was preceded by a gait transition qualitatively indistinguishable from that during the incremental swim test. This suggests that fatigue in CTswim was linked to an inability to meet the tissue oxygen demands of exercise plus warming. This is consistent with the oxygen and capacity limited thermal tolerance (OCLTT) hypothesis, regarding the mechanism underlying tolerance of warming in fishes. Overall, fatigue at CTswim provides an ecologically relevant sub-lethal threshold that is more sensitive to extreme events than LOE at CTmax.

Published
2020

11. In vacuo responses of an AlGaAs vertical cavity surface emitting laser irradiated by 4.5 MeV protons

Author

Taylor, E.W., Paxton, A.H., Schone, H., Carson, R.F., Bristow, J., Lehman, J.A., Hibbs-Brenner, M.K., Morgan, R.A., and Marta, T.

Subjects
Lasers -- Research, Radiation -- Research, Protons -- Research, Space technology -- Research, Artificial satellites -- Research, Business, Electronics, Electronics and electrical industries
Abstract

Vertical cavity surface emitting lasers (VCSELs) have high potential for space applications, yet little is known of their sensitivity to radiation under vacuum conditions. The first observations of a commercially available proton implanted quantum well AlGaAs VCSEL operating at 850 nm in vacuo and irradiated by 4.5 MeV protons by a scanning ion microbeam is presented. Degradation of L-I-V responses at a proton dose of 1.19 MGy are discussed with particular attention drawn to heating arising from increased nonradiative carrier recombination and that resulting from the vacuum environment.

Published
1998

12. Cardiac performance in relation to oxygen supply varies with dietary lipid composition in sturgeon

Author

Agnisola, C., McKenzie, D.J., Taylor, E.W., Bolis, C.L., and Tota, B.

Subjects
Unsaturated fatty acids -- Physiological aspects, Heart -- Physiological aspects, Sturgeons -- Research, Oxygen in the body -- Analysis, Biological sciences
Abstract

Dietary n-3 polyunsaturated fatty acids (PUFA) in sturgeon alter fatty acid composition of the myocardium and heart rate, and have favourable effects on their ability to respond to changes in oxygen supply. Sturgeons fed on PUFA have the ability to maintain oxygen uptake and spontaneous locomotor activity in hypoxia. Addition of vitamin E fails to influence the effect of dietary PUFA on cardiac performance.

Published
1996

13. Canine genetic linkage study using heterologous DNA probes

Author

Sack, G.H., Jr., Taylor, E.W., Meyers, D.A., Dragwa, C.R., and Cork, L.C.

Subjects
DNA probes -- Usage, Linkage (Genetics) -- Research, Hybridization -- Research, Biological sciences
Abstract

Segregation studies with heterologous single-copy human DNA probes in dogs indicate that different linkage groups present in humans are separate in dogs. The canine counterparts of the human serum amyloid gene group, however, have close linkages like the human genes. Hybridization signals are present in eight of the seventeen human clones when used with Southern blots of canine DNA. DNA markers attached to human genetic neuromuscular diseases are independent of hereditary canine spinal muscular atrophy.

Published
1996

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